ANALYSIS ON MECHANICS CHARACTERISTIC FOR DEEP-DRAWING PROCESS OF PANEL PARTS

Li Zan

(State Key Laboralory of Die & Mould Technology, HuaZhong University of Science &Technology, Wuhan 430073)

Dong Xianghuai

(National Die/Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030)

Li Jianjun

(State Key Laboralory of Die & Mould Technology, HuaZhong University of Science &Technology, Wuhan 430073)

Abstract: Mechanics characteristic for deep-drawing process of panel parts is analysed by upper-bound method. With the stress and strain rate distribution in the flange must being continuous, it cause that a great many particles of circular angle area flow into straight side area in the deep-drawing process of panel part. Therefore, the transition region forms between a circular angle area & straight side area, where the flow resistance is of maximum. This is a essential mechanics characteristic in the deep-drawing process of panel parts. It is a key technology to improve the forming ability of sheet metal that flow resistance in the transition region is decreased with a designed process measures.

Key words: Deep-drawing  Mechanics characteristic

Transition region  Flow resistance

CLC No: TG386.3

“十五”国家科技攻关重点资助项目(2001BA205B09). Received 20040509, received in revised form 20041026